<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert title="注意：只允许为第三级分类设置相关参数！" type="warning" show-icon :closable="false"></el-alert>
      <!-- 选择商品分类 -->
      <el-row class="cat_opt">
        <el-col >
          <span>选择商品分类：</span>
          <!-- 级联选择框 -->
          <el-cascader
    v-model="selectedKeys"
    :options="cateList"
    :props="cascaderProps"
    @change="handleChange"
    clearable></el-cascader>

        </el-col>
      </el-row>

<!-- tab页签区域 -->
<el-tabs v-model="activeName" @tab-click="handleTabClick">
    <el-tab-pane label="动态参数" name="many">
      <!-- 添加动态参数面板 -->
      <el-button type="primary" size="mini" :disabled="idBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
      <!-- 动态参数表格 -->
<el-table :data="manyTableData" style="width: 100%" border stripe>
      <!-- 展开行 -->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <!-- 循环渲染Tag标签 -->
          <el-tag v-for="(item, index) in scope.row.attr_vals" :key="index" closable @close="handleClosed(index,scope.row)">{{item}}</el-tag>
<!-- 文本输入框 -->
          <el-input
  class="input-new-tag"
  v-if="scope.row.inputVisible"
  v-model="scope.row.inputValue"
  ref="saveTagInput"
  size="small"
  @keyup.enter.native="handleInputConfirm(scope.row)"
  @blur="handleInputConfirm(scope.row)"
>
</el-input>
<!--添加标签 按钮 -->
<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

        </template>
      </el-table-column>
      <!-- 索引 -->
      <el-table-column type="index"></el-table-column>
      <el-table-column
        prop="attr_name"
        label="参数名称">
      </el-table-column>
<el-table-column label="操作">
        <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">
            编辑
          </el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(scope.row.attr_id)">
            删除
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    </el-tab-pane>
    <el-tab-pane label="静态属性" name="only">
      <!-- 添加属性参数面板 -->
      <el-button type="primary" size="mini" :disabled="idBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
<!-- 静态属性表格 -->
<el-table :data="onlyTableData" style="width: 100%" border stripe>
      <!-- 展开行 -->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <!-- 循环渲染Tag标签 -->
          <el-tag v-for="(item, index) in scope.row.attr_vals" :key="index" closable @close="handleClosed(index,scope.row)">{{item}}</el-tag>
<!-- 文本输入框 -->
          <el-input
  class="input-new-tag"
  v-if="scope.row.inputVisible"
  v-model="scope.row.inputValue"
  ref="saveTagInput"
  size="small"
  @keyup.enter.native="handleInputConfirm(scope.row)"
  @blur="handleInputConfirm(scope.row)"
>
</el-input>
<!--添加标签 按钮 -->
<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

        </template>
      </el-table-column>
      <el-table-column type="index"></el-table-column>
      <el-table-column
        prop="attr_name"
        label="属性名称">
      </el-table-column>
<el-table-column label="操作">
        <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">
            编辑
          </el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(scope.row.attr_id)">
            删除
          </el-button>
        </template>
      </el-table-column>
    </el-table>
      
    </el-tab-pane>
  </el-tabs>
    </el-card>

<!-- 添加参数的对话框 -->
    <el-dialog
  :title="'添加'+ titleText"
  :visible.sync="addDialogVisible"
  width="50%" @close="addDialogClosed">

  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
  <el-form-item :label="titleText" prop="attr_name">
    <el-input v-model="addForm.attr_name"></el-input>
  </el-form-item>
  </el-form>

  <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
</el-dialog>


<!-- 修改参数的对话框 -->
    <el-dialog
  :title="'修改'+ titleText"
  :visible.sync="editDialogVisible"
  width="50%" @close="editDialogClosed">

  <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" >
  <el-form-item :label="titleText" prop="attr_name">
    <el-input v-model="editForm.attr_name"></el-input>
  </el-form-item>
  </el-form>

  <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
</el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      cateList: [],
      // 级联选择双向绑定数组
      selectedKeys:[],
      cascaderProps:{
        expandTrigger: 'hover',
        value:'cat_id',
        label:'cat_name',
        children:'children',
        disabled:'cat_deleted',
      },
      // 被激活的页签
      activeName:'many',
      // 动态参数数据
      manyTableData:[],
      // 静态属性数据
      onlyTableData:[],
      // 控制对话框的显示与隐藏
      addDialogVisible:false,
      // 添加参数的表单对象
      addForm:{
        attr_name:''
      },
      // 添加参数的表单验证规则对象
      addFormRules:{
        attr_name:[
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      },

      // 修改参数的显示与隐藏
      editDialogVisible:false,
      // 表单对象
      editForm:{},
      // 表单对象验证规则
      editFormRules:{
        attr_name:[
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      }



    }
  },
  created(){
    this.getCateList()
  },
  methods: {
    async getCateList(){
      const {data :res} = await this.$http.get('categories')
      if(res.meta.status != 200) return this.$message.error(res.meta.msg)
      this.cateList = res.data
    },
    // 级联选择框变化函数
     handleChange(){
      // console.log(this.selectedKeys)
      this.getParamsData()

    },
    // tab页签点击事件的处理函数
    handleTabClick(){
      // console.log(this.activeName)
      this.getParamsData()

    },
    // 获取参数列表
    async getParamsData(){
      if(this.selectedKeys.length != 3){
        this.selectedKeys = []
      // 动态参数数据
      this.manyTableData = []
      // 静态属性数据
      this.onlyTableData = []
        return
      }
      //  console.log(this.selectedKeys)
    const {data:res} = await  this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})
    if(res.meta.status != 200 ) return this.$message.error(res.meta.msg)
    res.data.forEach(item=>{

      item.attr_vals = item.attr_vals?item.attr_vals.split(','):[],
      item.inputVisible = false,
      item.inputValue = ''
    })
    console.log(res.data)
    if(this.activeName == 'many'){
      this.manyTableData = res.data
    }else{
      this.onlyTableData = res.data
    }

    },
    // 添加参数对话框窗口关闭后重置输入内容
    addDialogClosed(){
      this.$refs.addFormRef.resetFields()
    },
    // 添加动态参数或者静态属性 
    addParams(){
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid) return

        const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
          attr_name:this.addForm.attr_name,
          attr_sel:this.activeName
        })

        if(res.meta.status != 201) return this.$message.error(res.meta.msg)

        this.$message.success(res.meta.msg)

        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    // 点击编辑按钮显示与隐藏修改参数界面
    async showEditDialog(attr_id){

      const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params:{
        attr_sel:this.activeName
      }})

      if(res.meta.status != 200) return this.$message.error(res.meta.msg)

      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 修改参数对话框关闭事件，重置表单
    editDialogClosed(){
      this.$refs.editFormRef.resetFields()
    },
    // 修改参数，提交表单数据
    editParams(){
          this.$refs.editFormRef.validate(async valid=>{
            if(!valid) return

          const{data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{
              attr_name:this.editForm.attr_name,
              attr_sel:this.activeName
            })

          if(res.meta.status != 200) return this.$message.error(res.meta.msg)

          this.getParamsData()
          this.$message.success(res.meta.msg)
          this.editDialogVisible = false

          })
    },
    // 删除参数属性
    deleteParams(attr_id){

  this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(async () => {

        const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)

        if(res.meta.status != 200 ) return this.$message.error(res.meta.msg)

        this.getParamsData()
          this.$message({
            type: 'success',
            message: '删除成功!'
          });
        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          });          
        });

    },
    // Tag标签的文本输入框触发的事件
  async handleInputConfirm(row){
if(row.inputValue.trim().length == 0){
  row.inputVisible = false
  row.inputValue = ''
  return
}

row.attr_vals.push(row.inputValue.trim())

const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
  attr_name:row.attr_name,
  attr_sel:row.attr_sel,
  attr_vals:row.attr_vals.join(',')
})
if(res.meta.status != 200) return this.$message.error(res.meta.msg)

this.$message.success(res.meta.msg)


    row.inputVisible = false
    row.inputValue = ''
    },
    // 显示文本输入框
    showInput(row){
      row.inputVisible = true
// $nextTick 页面重新渲染之后再调用回调中的代码
      this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    // 删除标签
   async handleClosed(index,row){

row.attr_vals.splice(index,1)

const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
  attr_name:row.attr_name,
  attr_sel:row.attr_sel,
  attr_vals:row.attr_vals.join(',')
})
if(res.meta.status != 200) return this.$message.error(res.meta.msg)

this.$message.success(res.meta.msg)

    }

  },
  computed: {
    // 如果按钮需要被禁用，返回true,否则返回false
    idBtnDisabled(){
      if(this.selectedKeys.length !== 3){
        return true
      }else{
        return false
      }
    },
    // 当前选中的分类 ID
    cateId(){
      if(this.selectedKeys.length == 3){
        return this.selectedKeys[2]
      }
      return null
    },
    // 动态计算标题
    titleText(){
      if(this.activeName == 'many'){
        return '动态参数'
      }else{
        return '静态属性'
      }
    }

  },

}
</script>

<style lang="less" scoped>
.cat_opt{
  margin: 15px 0;
}
.el-tag{
  margin: 5px;
}
.input-new-tag{
  width: 120px;
}
</style>